Hood for furnaces.



J. W. SHIRTGLIFP.

HOOD FOB FURNACES. nruornon nun min. ma.

Patented Feb. 17, 1914.

I ume-sun J. W. SHIRTGLIFP.

HOOD FOR FURNACES.

APPLICATION FILED PEB.24, 1913 1,087,894. Patented Feb.17, 1914.

2 SHEETS-333! 2.

coumm WA!" 50-. INK m, D. C.

JOHN W. SHIR'IOLIFF, 01? DENVER, COLORADO.

HOOD FOR FURNACES.

nosasoa.

Specification of Letters Patent.

Patented Feb. 1'7, 1914.

Application filed February 2-4, 1913. Serial No. 7503075.

To all whom it may concern:

Be it known that I, JOHN W. Snnrromrr, a citizen of the United States,residing in the city and county of Denver and State of Colorado, haveinvented certain new and useful Improvements in Hoods for Furnaces; andI do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters and figures of referencemarked thereon, which form a part of this specification.

My invention relates to improvements in hoods for furnaces, and consistsprincipally in a removably supported hood adapted to cover the exposedportion of a grate, such as is commonly used in brick kilns.

The principal object of the invention is to provide a hood for a grateof this class which shall prevent the escape of the smoke and gasesliberated from the fuel by heat and to direct said smoke and gases backto the fire upon the grate where they are consumed.

Another object of the invention is to provide means for readily movingthe hood to and away from its operative position.

Still another object is to provide vertical guides upon which said hoodmay slide and supports vertically adjustable upon the guides.

Other objects will appear hereinafter, as I proceed with the descriptionof that embodiment of the invention, which, for the purposes of thepresent application, I have illustrated in the accompanying drawings, inwhich:

Figure l is a fragmental cross section through a portion of a cupolabrick kiln provided with my improved adjustable hood. Fig. 2 is a sideelevation of the hood and its supporting means, the view being taken inthe direction of the arrow 2, Fig. 3. Fig. 3 is a plan view, or a viewlooking in the direction of the arrow 3, Fig. 1. Fig. 4 is a frontelevation. Fig. 5 is a similar view illustrating a modified supportingmeans for use with a kiln of slightly difierent construction.

Similar reference numerals refer to like parts throughout the views.

In the drawings, which forma part of this specification, the numeral 5refers to the wall of a kiln provided with a perforated false floor 6.The lower portion of the wall is cut away, at 7 to form an opening for afurnace, the rear wall of which'isdesignated by the numeral 8 and theone side wall visible in the drawing by the number 9. The draft isupward into the kiln, then downward through the false floor 6 and intothe chamber 10 below the fioor 6 and thence to a stack or other draftproducing means (not shown).

Extending across the lower portion of the furnace and the opening 7 is agrate 12-supported upon cross rods 13 and 14. A sec 0nd portion of thegrate has its bars 15 mounted behind the rod 14 and extending upwardlyand outwardly, being supported by a rod 16 which is anchored in the wallof the kiln.

Coal is piled upon the grate and allowed to lie outside of the furnaceproper, as shown in Fig. 1, in order that it may be thoroughly cokedbefore being burned, thus reducing the amount of smoke which passes intothe kiln to the damage of the brick by discoloration.

It will be evident that if the exterior por tion of the grate is leftentirely open, smoke and unburned gases will pass off into theatmosphere and a considerable part of the heat values of the coal willbe lost thereby. For the sake of preventing this loss, I have invented ameans for redirecting the smoke and gases through the fiames of thefurnace, where they are consumed, said means consisting broadly of ahood 1? of non-com bustible material preferably fire clay, the hoodbeing of dimensions sufficient to cover the extremity of the exposedportion of the grate and the space between the latter and the wall ofthe furnace.

It is desirable to so mountthe hood that it may be easily and quicklyshifted from the operative to the inoperative position, and vice versa.To this end, I arrangevertical guide rods 18 upon opposite sides of thefurnace opening supporting them preferably in suitable bases 19. At thetop, the rods 18 are connected by a horizontal rod 20 and at thejunctures of the vertical and horizontal rods small rods 21 extendinwardly toward the furnace and have a sliding engagement with thehollow rods 22 fastened to the furnace wall, the rods 21 being retainedin adjusted position by means of set screws 23. Depending from therod-20, near its middle point is a pulley 24, while a second pulley 25hangs from the same rod, near one of its extremities. A. flexibleconnection 26 preferably a cable or chain, passes over the sheaves ofthe two pulleys, a counterbalancing weight 27 being attached to one endof the flexible connection and the opposite end being secured at 28 tothe brackets 29 which are fastened upon the hood 17.. Attached to andextending outwardly from the brackets 29 are guide arms 30 which haveeyes 31 at their outer extremities surrounding and loosely slidable uponthe rods 18. Supports 32 are mounted upon slidable sleeves 38 which maybe located in any desired position by set screws provided with handles34-.

in Fig. 5 is illustrated a slightly modified arrangement of furnace, inwhich small buttresses 35 are built upon the furnace at the sides of thegrate opening. *vV here such a construction is employed, the hood I? ispermitted to rest directly upon the tops of the buttresses, and theguide rods 18 are embedded at their lower extremities in the buttresses.

It will be apparent that when an operator desires to raise the hood 17for the purpose of adding fuel, he may grasp the weight 27 and pulldownwardly thereupon until the hood and weight take the positionsindicated by broken lines in Figs. l and 5, while the lowering of thehood is merely the reverse operation, both movements benig performedwith very little effort owing to the fact that the hood and weightapproximately counterbalance each other.

I claim as my invention:

1. The combination with a furnace having a grate, a portion of whichprotrudes outwardly from the wall of the furnace, of anon-fusible hoodadapted to cover the Copies 0! this patent may be obtained for fivecents each, by addressing the Commissioner of Patents, Washington, D. 0.

upon said guide rods.

space between the extremity of the grate and the wall of the furnace,vertical guide rods mounted upon opposite sides of the grate, meansattached to said hood an I slidably engaging the guide rods and 'supports for said hood vertically adjustable 2. The combination with a kilnhaving a grate, a portion of which protrudes outwardly beyond the wallof the kiln, of a nonfusible hood adapted to cover the space between theextremity of the grate and they wall of the furnace, a removable frameincluding vertical guide rods adapted to rest a upon the ground, meansfor removably securing the upper end of the frame to the kiln wall, saidhood being vertically slidable upon said rods and counterbalancing meansfor said hood also mounted upon the frame. i

3. The combination with a kiln having a. grate, a portion of whichprotrudes outwardly from the wall of the kiln, of a nonfusible hoodadapted to cover the space be-- tween the extremity of the grate and thewall of the furnace, a removable frame in cluding vertical guide rodsadapted to rest upon the ground, means for removably securing the upperend of the frame to the kiln wall, said means being arranged to permitadjustment toward and away from' the wall, said hood being verticallyslidable upon said rods and counterbalancing means for said hood alsomounted upon the frame. In testimony whereof I aflix my signature inpresence of two witnesses.

JOHN WV. SHIRTCLIFF. Witnesses ANNA LOUISE LEHMAN, A. EBERT OBRIEN.

